[PATCH 21/21] userfaultfd: add userfaultfd_wp mm helpers
From: Andrea Arcangeli <hidden>
Date: 2015-03-05 17:25:10
Also in:
kvm, linux-mm, lkml, qemu-devel
Subsystem:
memory management - userfaultfd, the rest · Maintainers:
Andrew Morton, Mike Rapoport, Linus Torvalds
These helpers will be used to know if to call handle_userfault() during wrprotect faults in order to deliver the wrprotect faults to userland. Signed-off-by: Andrea Arcangeli <redacted> --- include/linux/userfaultfd_k.h | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index 3c39a4f..81f0d11 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h@@ -65,6 +65,11 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma) return vma->vm_flags & VM_UFFD_MISSING; } +static inline bool userfaultfd_wp(struct vm_area_struct *vma) +{ + return vma->vm_flags & VM_UFFD_WP; +} + static inline bool userfaultfd_armed(struct vm_area_struct *vma) { return vma->vm_flags & (VM_UFFD_MISSING | VM_UFFD_WP);
@@ -92,6 +97,11 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma) return false; } +static inline bool userfaultfd_wp(struct vm_area_struct *vma) +{ + return false; +} + static inline bool userfaultfd_armed(struct vm_area_struct *vma) { return false; --
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